
pltimefmt: Set format for date / time labels 

DESCRIPTION:

    This function is used in example 29. 

SYNOPSIS:

pltimefmt(fmt)

ARGUMENTS:

    fmt (const char *, fmt) :     This string is passed directly to the
    system strftime. See the system documentation for a full list of
    conversion specifications for your system. All conversion
    specifications take the form of a '%' character followed by
    further conversion specification character. All other text is
    printed as-is. Common options include: %c: The preferred date and
    time representation for the current locale.  
        %d: The day of the month as a decimal number.  
        %H: The hour as a decimal number using a 24-hour clock.  
        %j: The day of the year as a decimal number.  
        %m: The month as a decimal number.    
        %M: The minute as a decimal number.  
        %S: The second as a decimal number.  
        %y: The year as a decimal number without a century.  
        %Y: The year  as a decimal number including a century.  
